Zobrazeno 1 - 10
of 51
pro vyhledávání: '"Marcel Auguste Dardenne"'
Autor:
Bruna S. Almeida, Eldrick L. Esper, Garry R. Davidson, Kevin Faure, Brian Rusk, Marcel Auguste Dardenne, Paulo J. Guimarães, Flavio Henrique Freitas-Silva, Brian Thomson, R. J. Holcombe, Nicholas H.S. Oliver
Publikováno v:
Economic Geology. 110:1803-1834
Multiscale structural and geochemical studies have been applied to understand the genesis of the Paracatu deposit in Brazil, a shallow-dipping, bulk-tonnage, vein-style low-grade Au(-Ag-Pb-Zn) orebody hosted in ~1000 Ma black phyllites of the Paracat
Publikováno v:
Ore Geology Reviews. 56:234-257
Thesis (Master, Geological Sciences & Geological Engineering) -- Queen's University, 2012-02-29 16:45:36.41
Autor:
Flavio Henrique Freitas-Silva, José Eloi Guimarães Campos, Marcel Auguste Dardenne, Marco Antonio Caçador Martins-Ferreira
Publikováno v:
Brazilian Journal of Geology. 43:461-476
The Paranoa Group represents a psamo-pelitic-carbonated succession deposited in shelf conditions. The stratigraphy of this important lithostratigraphic sequence of the Brasilia Fold Belt was originally proposed by letter-code designation that include
Autor:
Marcel Auguste Dardenne, Bernhard Bühn, Roberto Ventura Santos, Claudinei Gouveia de Oliveira
Publikováno v:
Chemical Geology. :163-176
Mass-independent sulfur isotope fractionation (MIF) has been observed in rocks of the geological record older than about 2.45 Ga, a characteristic which is thought to be related to processes in the Neoarchean atmosphere. Samples recording a MIF effec
Autor:
Marcel Auguste Dardenne, E.L. Dantas, Márcio Martins Pimentel, C.J.S. de Alvarenga, M. Matteini
Publikováno v:
Precambrian Research. :168-181
The eastern portion of the Brasilia belt, part of the Neoproterozoic Tocantins Province in central Brazil, is mainly constituted by metasedimentary rocks that partially represent the evolution of a passive margin developed during the Meso-Neoproteroz
Autor:
Richard Armstrong, C. J. S. Alvarenga, Marcel Auguste Dardenne, Márcio Martins Pimentel, M. Matteini, Bernhard Bühn, Joseneusa Brilhante Rodrigues
Publikováno v:
Gondwana Research. 21:439-450
The Vazante Group show varied U–Pb provenance patterns along the basin. Zircon ages range from 936 to 3409 Ma, but Paleo- and Mesoproterozoic terrains constitute the main sources of the original sediments. The youngest population (~ 930 Ma) establi
Autor:
Marcel Auguste Dardenne, Alan J. Kaufman, Tolentino Flávio de Oliveira, Alcides N. Sial, Karem Azmy, Aroldo Misi
Publikováno v:
Geological Society, London, Memoirs. 36:509-522
The Neoproterozoic successions of the Sao Francisco Craton are primarily represented by the Bambui and Una groups, deposited in cratonic epicontinental basins, and by the Vazante and Vaza Barris/Miaba groups, which accumulated on passive margins on t
Autor:
Carlos José Souza de Alvarenga, Alexandre Uhlein, Paulo César Boggiani, Marly Babinski, Roland Trompette, Milene Freitas Figueiredo, Alcides N. Sial, Roberto Ventura Santos, Marcel Auguste Dardenne, Elton Luiz Dantas
Publikováno v:
Geological Society, London, Memoirs. 36:487-497
Discontinuous exposures of diamictite (>1000 km) termed the Puga Formation (Fm.) and interpreted as being related to a late Cryogenian glacial event are known in the Paraguay Belt (Brazilian–Pan-African Orogeny) and part of the Amazon craton and Ri
Publikováno v:
Geological Society, London, Memoirs. 36:541-546
Glaciogenic deposits of the Jequitai Formation (Fm.) are well exposed along the margins of the Serra do Cabral on the Sao Francisco Craton, southeastern Brazil. The Jequitai Formation is thin (0–150 m thick), lenticular and overlies the Espinhaco S
Autor:
Richard Armstrong, Marcel Auguste Dardenne, Joseneusa Brilhante Rodrigues, Márcio Martins Pimentel
Publikováno v:
Journal of South American Earth Sciences. 29:512-521
The Brasilia Belt is one of the best preserved Neoproterozoic orogens in Brazil. It comprises a thick Meso–Neoproterozoic sedimentary/metasedimentary pile including the Canastra and Ibia Groups, which are the object of this study. The Canastra Grou